Thanks @Mark
{
"key": "ctrl+j",
"command": "selectNextSuggestion",
"when": "suggestWidgetMultipleSuggestions && suggestWidgetVisible && textInputFocus"
},
{
"key": "ctrl+k",
"command": "selectPrevSuggestion",
"when": "suggestWidgetMultipleSuggestions && suggestWidgetVisible && textInputFocus"
},